The 301st prohibition is that we are forbidden from gossiping.

The source of this commandment is G‑d's statement (exalted be He),1 "Do not go around as a gossiper among your people."

Our Sages2 explained, "Do not speak softly to one and harshly to another. Another explanation: Do not act like a traveling salesman by traveling around carrying words."3

This prohibition includes4 not to publicize a shem ra.5